I am investigating the effect of dynamical friction (DF) due to a dark matter spike, on the motion of a black hole in the binary system OJ287.

在双星系统OJ287中，超大质量黑洞的绝热增长，加上暗物质晕，理论上应该与中心附近暗物质峰的形成相吻合。二次黑洞预计将通过动力摩擦与Dm粒子相互作用。我们可以数值模拟黑洞的轨道，并引入几种效应来研究它们对运动的预期影响。我们计划计算二次黑洞穿过吸积盘的时间(这对应于光爆发发生的时间)，有没有DF和COMPARE。我们计划在蟒蛇上进行这项工作

The adiabatic growth of the supermassive black hole in the binary system OJ287, 'dressed' with a dark matter halo, should theoretically coincide with the formation of a dark matter spike near the center. The secondary black hole is expected to interact with the DM particles via dynamical friction. We can simulate the orbit of the black hole numerically and introduce several effects to investigate their expected impact on the motion. We plan to compute the times at which the secondary BH crosses the accretion disk (this corresponds to the times at which the optical outbursts occur), with and without DF and compare. We plan to conduct this on python